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Please help me identify these components!

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WyverntekGameRepairs:
Hey there, so I’m not good with lasers and tube technology as of yet, but these look like lasers. They have a manufacture date code of January 1992. The numbers that stand out the most to me is LGR 7655. I looked it up and found lasers, but they were a totally different construction and date. Can someone help me identify the details of these components? A data sheet would be fantastic! Google is currently failing me.
Thank you!

Also, I held them so you could get an idea of the size.

StillTrying:
Neon Helium Lasers according to the tech site ebay. ???

james_s:
Those are helium-neon laser tubes, almost certainly the common 632.8nm red at about 0.5mW in good health. Small tubes like those were commonly used in handheld barcode scanners back before visible diode lasers became available.

They have some value to the right person, a direct emission diode can't touch the beam quality or wavelength stability of a gas laser.

WyverntekGameRepairs:

--- Quote from: james_s on January 09, 2020, 02:04:57 am ---Those are helium-neon laser tubes, almost certainly the common 632.8nm red at about 0.5mW in good health. Small tubes like those were commonly used in handheld barcode scanners back before visible diode lasers became available.

They have some value to the right person, a direct emission diode can't touch the beam quality or wavelength stability of a gas laser.

--- End quote ---

Hm, quite interesting. I’ll need to see if I can get a proper driver for it. I think I know where to  acquire them, but just in case, anyone is welcome to post links to listings of driver boards for this laser tube.

Also... .5mW? These have .64 and .65 mW written directly on them!

james_s:
The power supplies are usually potted bricks, for small tubes like that the voltage will be around 1200V at a few mA. Those labels certainly suggest that was the measured power at some point. Sam's laser FAQ is a goldmine of information.

https://www.repairfaq.org/sam/lasersam.htm

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